Arbor



FIG. 1 is perspective view of an arbor in accordance with the present invention;

FIG. 2 is a front view of an arbor;

FIG. 3 is a back view of an arbor;

FIG. 4 is a left side view of an arbor;

FIG. 5 is a right side view of an arbor; and,

FIG. 6 is a top view of an arbor. 

The ornamental design of an arbor, as shown and described. 